Dentifrice compositions containing polyphosphate and fluoride
CA 2271302 C · Owner: Glandorf, William Michael · Inventors: Estes, Paul Donald; White, Donald James Jr.; Cox, Edward Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are oral formulations contained in physically separated compartments of a dentifrice dispenser, comprising a first dentifrice composition and a second dentifrice composition. The first dentifrice composition comprises an effective amount of one or more linear polyphosphates having an average chain length of about 4 or more, an effective amount of a buffering agent and one , or more aqueous carriers, wherein the first dentifrice composition has a total water content of from about 5 % to about 20 %. The second dentifrice composition comprises a soluble fluoride ion source an effective amount of a , buffering agent and one or more aqueous carriers.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 18, 1997 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.